diff options
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/adc/ad799x.c | 31 |
1 files changed, 15 insertions, 16 deletions
diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c index 878400c33137..b3799a8056c8 100644 --- a/drivers/iio/adc/ad799x.c +++ b/drivers/iio/adc/ad799x.c @@ -32,6 +32,7 @@ #include <linux/types.h> #include <linux/err.h> #include <linux/module.h> +#include <linux/bitops.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> @@ -41,7 +42,7 @@ #include <linux/iio/triggered_buffer.h> #define AD799X_CHANNEL_SHIFT 4 -#define AD799X_STORAGEBITS 16 + /* * AD7991, AD7995 and AD7999 defines */ @@ -55,10 +56,10 @@ * AD7992, AD7993, AD7994, AD7997 and AD7998 defines */ -#define AD7998_FLTR 0x08 -#define AD7998_ALERT_EN 0x04 -#define AD7998_BUSY_ALERT 0x02 -#define AD7998_BUSY_ALERT_POL 0x01 +#define AD7998_FLTR BIT(3) +#define AD7998_ALERT_EN BIT(2) +#define AD7998_BUSY_ALERT BIT(1) +#define AD7998_BUSY_ALERT_POL BIT(0) #define AD7998_CONV_RES_REG 0x0 #define AD7998_ALERT_STAT_REG 0x1 @@ -69,7 +70,7 @@ #define AD7998_DATAHIGH_REG(x) ((x) * 3 + 0x5) #define AD7998_HYST_REG(x) ((x) * 3 + 0x6) -#define AD7998_CYC_MASK 0x7 +#define AD7998_CYC_MASK GENMASK(2, 0) #define AD7998_CYC_DIS 0x0 #define AD7998_CYC_TCONF_32 0x1 #define AD7998_CYC_TCONF_64 0x2 @@ -85,10 +86,8 @@ * AD7997 and AD7997 defines */ -#define AD7997_8_READ_SINGLE 0x80 -#define AD7997_8_READ_SEQUENCE 0x70 -/* TODO: move this into a common header */ -#define RES_MASK(bits) ((1 << (bits)) - 1) +#define AD7997_8_READ_SINGLE BIT(7) +#define AD7997_8_READ_SEQUENCE (BIT(6) | BIT(5) | BIT(4)) enum { ad7991, @@ -205,12 +204,12 @@ static int ad799x_scan_direct(struct ad799x_state *st, unsigned ch) case ad7991: case ad7995: case ad7999: - cmd = st->config | ((1 << ch) << AD799X_CHANNEL_SHIFT); + cmd = st->config | (BIT(ch) << AD799X_CHANNEL_SHIFT); break; case ad7992: case ad7993: case ad7994: - cmd = (1 << ch) << AD799X_CHANNEL_SHIFT; + cmd = BIT(ch) << AD799X_CHANNEL_SHIFT; break; case ad7997: case ad7998: @@ -244,7 +243,7 @@ static int ad799x_read_raw(struct iio_dev *indio_dev, if (ret < 0) return ret; *val = (ret >> chan->scan_type.shift) & - RES_MASK(chan->scan_type.realbits); + GENMASK(chan->scan_type.realbits - 1, 0); return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: ret = regulator_get_voltage(st->vref); @@ -359,7 +358,7 @@ static int ad799x_write_event_value(struct iio_dev *indio_dev, int ret; struct ad799x_state *st = iio_priv(indio_dev); - if (val < 0 || val > RES_MASK(chan->scan_type.realbits)) + if (val < 0 || val > GENMASK(chan->scan_type.realbits - 1, 0)) return -EINVAL; mutex_lock(&indio_dev->mlock); @@ -388,7 +387,7 @@ static int ad799x_read_event_value(struct iio_dev *indio_dev, if (ret < 0) return ret; *val = (ret >> chan->scan_type.shift) & - RES_MASK(chan->scan_type.realbits); + GENMASK(chan->scan_type.realbits - 1 , 0); return IIO_VAL_INT; } @@ -408,7 +407,7 @@ static irqreturn_t ad799x_event_handler(int irq, void *private) goto done; for (i = 0; i < 8; i++) { - if (ret & (1 << i)) + if (ret & BIT(i)) iio_push_event(indio_dev, i & 0x1 ? IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, |